Telephone repeater system.



TELB'BHQNI: R'EPBATER SYSTEM. APPLIGATION FILED APR. 2.. 1913.

14,125,832. Patented Jan. 19.1915.

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tueren sessies refreincruce JUSTUS FRY; F SEATTLE. WASHINGTON remar-BONE REPEA'IER SYSTEM. i

of Washingtonglmve invented certixin new and 'useful lirnprovements 'in TelephoneRepea'ter Sysllems, o txvhich the following is a specification;

This intent-ion relates more' particularly to long'- di'stence telephone systems.

The .object'of the invention ,is-the 'im-' movement of' s vste'i'ns of this' chrncter whereby roicel sounds may be transmitted fromeither end of theiline Without n iter` ference or -retrdntionfronrother voicesounds byproriding mean'sunder the con-l t-rolfof an operator whereby the line 'may used to carry inbut one direction :it a tiniepf The 'i'nventionconsists. in the novel 'adapta-.

tion ".:i'ndf'onibin'ation of .devices :is will -'be hereinnfter 'described .and claimed.

'forms of 'the controlling circuits with the s'n me' grounded.

having' two stations :IAT :ind :k1 and aninter-- medi-nte *relay sta-tion although 'is to lhe understood vth'atfthe ini-'en tion isi- 2119; l pliczible to systemsinwhich n plurali-ty ot 3.5

relai"- sta-tio'ns may. be used.

type hat-ing transmitters :ind receivers 6A relay sttion is provided" with .relaymag-nets if and 71vl which-uponoccasion, serve to operatively connect'the line-wires of sta tions- A md A 1. The magnet armatures S and 8l lare secured to arms Send- 91;

which, 'inturn;nreconnectecl to lthe helix of wire-15 is an open one having termina-ls 1 7- which are connected by a'gap closer 18 provided: on rela)r -arin 9l when the latter is 'in its inoperative position with respecttotne iagnet 71. Included in such clrcult-is e battery 19 and resistance coils indicet'ed -by 20. The' ccntroller circuit for statlon A1,

Specificatie 0f Lr'wl' Pefent. lateutedfnn. 19, l1915. Appiicatin fue@ April 2. i913. serial No, 73,3%. I

` is iu liliei'nuuner cmuprised ot. wires 111 .f' :xml lll which embrace the u dingzof rhe muguet il -ziud ihave for wire-1 termiu.ils LT1 -whicli :u'e arranged to be connected liv :i anp closer 1S* carried 0n'tlie'relejvv arm `l ot the magnet? when the arm'. is swung therefrom upoiudenergzing the nmg'net. 'Also included'in the controller" circuit' otr fstzllio'li isn v buttery 191":ind 'resistance c ils. us 201.

'connected hi.' iti res 29..;1nd. Q3 with the linea wires l'fmuul 114 tl'irough the'incdium of coni' llene-ers 'Lla "Silnilzi'rlyr the receierjinem 'lier 2 1 th-Other 1hr' u'ires-v 221- und' repeater Cis connected lfm-ith the line-Wires llyand Thetransmitter member. frfof repeater C Foi-'the talking circuits there -nre provided atftl`ie-` relz 1y statlon suitablevoice nn'ip'lifiers orjhigli. powerfreiieaters'@ .3-1 f through -'=condenserisf is v'comiet-ted.' by 'wire 26,.' u'hich' includes 'aj :isn 'contluctor-@The 4c'oin'panion Wire 98 'troni su icl'. transmitter meinberis' connected with the pri mary 'ot induction 'coils 29 Whose setxiiuilzuji'.is-connected b vwire 3 0, 'as sliQWn,

with the'linefii'ire lll-thl'oii'fih the mediuml ot' n condenser; Siu'uflu'lmfthe primary of induction coils-'29 fis connected b v a Wire the 'secouglziiv litthegcoils is connected b v ivire3%(1xrith the line'w'ire 14. -'I`li 'ef 0tlier-l wire .trom the twinsn'iittex" .member in-- cludes u butter-V271; und is connected u'ith-v tliei-elni* :urn 9?.

f 'lhe iu'i'mnries und seconda-ries of the 1 e-. spective induction coilsare lhriCl-pJed and thence :1re elmuected b v' Wires B1- and '311 p'rovi'led with terminals -32 ancl`321-.' Sup? wires 131' mid' llfthrougli:condensers 34? n nd :ire infor i ded with .terminals 35- and' 35h 'contacte-df 'br the' ir'm 9. when the latteris cuits sothat a 'person ateither-'station A' or 'A1- 'by' closing-his controller circuit not porarily inoperable, but also prevents the talking circuit from the remote station Vfrom being.- used except .recelvmg purposes,

' only renders the other controllercircuit temhence there will be no interference or retardatioii by 'a confusion of voice sounds on the line. More specifically, assumingthat a person at station A is to talk over the the key 10 is utilized to put battery 19 to line away from contacts 171 and. into operative contact with terminals 32 and 35, to coniplete the talling circuit from station lA. Bv

withdrawing the arm from contacts 171 the controller circuit for station. h1 is obviously caused to be inoperable to effect the'en'ergizing .of the magnet 71; conseoulently`4 the arm.

V91 is rendered incapable oi beingfbrought into contact with terminals 321 and 351 to close the talking circuit'leading from station A1.

The modification of the controller circuits shown in Figs. 2 and. 3 are rsulbstautiall similar to those shown in Fig. 1 exceptthat inFig.` 2 a relay is actuated from line wires as 13, 131 through the medium of bridging or simplex coils 40; one of such Acoils being connected by wireV 12L with main battery 191 and the complementary coil is'connected by wire 162 with the relay magnet. .The contacts32 and 35 are respectively connected, as shown, by wires 31.2 and 332 with a ground and the simplex coil of the'line-wires 131 and 141. grounded.

ln- Fig. 3, a relay is connected by wire 161 with one side of a'metallic circuit 13 *114; the controller key is connected by wire 123 including battery 193, and the line-wirr` l13 is grounded. Contact 35 is connected by wire 333 with the referred to circuit wire, and the other wire 31s extending from contact 3:2 is also grounded'.

The operation of the-devices illustrated in Figsf and 3 will, it is thought, be under- Astood without further description.

1. In a telephone system, the combination of two repeating instruments, two normally open local circuits respectively including thereceivers of the repeating instruments, normally `open electrical connections between the transmitter of each of said repeating instruments and the other local circuit, a nor- The Wire-111' in this case is alsol mally open controller circuit for each of said local circuits, and means regulated by the closing of either of said, controller cir,` cuits'whereby one of the aforesaid electrical connections is closed to render the telephone system operative from one direction only.

a relay-magnet for each of ls'aid local cir'- cuits, fr.. normally open controller circuit for each of said local 'circuits and'embracing the windings of the respective relay-magnets,

-and means regulated by the closing of either of said controllerl circuits andiY effected through the energizing of the respective relay-magnets whereby one. of the aforesaid i electrical connections is closed to render the telephone system operative from one direction only. 3. ln 'a telephone system,two normalhv incomplete local circuits each provided with 'a telephone receiver and a transmitter, a e relay instrument for each of said local circuits, line connections between the local circuits-and including said relay instruments, and a normally incomplete controller circuit 1 including a battery for each of said local circuits and means coperating with the aforesaid circuits and line connectionsfi which are regulated by the closing of either ot' said controller circuits. sol that the associated transmitter and the remote receiver" are'caused to be operable to transmit-sounds therebetween and thereby causing the remot-e transmitterend the'adjacent receiver to become inoperable forv the transmission 'of sounds therebetween until the referred to controller circuit isagain open. Signed at Seattle, llfash.. ihis 2Mb day of March, 1913.

JU STUS W. FRY.

I' lliitiiesses:

E. Permisos, Hormon BARNns. 

